[lldb][DWARFASTParserClang] Treat DW_TAG_template_alias like we do DW_TAG_typedef

[Michael137]

Depends on:

• [lldb][test] DWARFASTParserClangTests: extract test setup into helper structure #170132

Clang gained the -gtemplate-alias not too long ago, which emits C++ alias templates as DW_TAG_template_alias (instead of DW_TAG_typedef). The main difference is that DW_TAG_template_alias has DW_TAG_template_XXX children. The flag was not enabled by default because consumers (mainly LLDB) didn't know how to handle it. This patch adds rudimentary support for debugging with DW_TAG_template_alias.

This patch simply creates the same kind of TypedefDecl as we do for DW_TAG_typedef. The more complete solution would be to create a TypeAliasTemplateDecl and associated TypeAliasDecl. But that would require DWARF to carry generic template information, but currently each DW_TAG_template_alias represents a concrete instantiation. We could probably hack up some working AST representation that includes the template parameters, but I currently don't see a compelling reason to. All we need is the DW_AT_name and the DW_AT_type that the typedef refers to.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Michael Buch (Michael137)

Changes

Depends on:

• [lldb][test] DWARFASTParserClangTests: extract test setup into helper structure #170132

Clang gained the -gtemplate-alias not too long ago, which emits C++ alias templates as DW_TAG_template_alias (instead of DW_TAG_typedef). The main difference is that DW_TAG_template_alias has DW_TAG_template_XXX children. The flag was not enabled by default because consumers (mainly LLDB) didn't know how to handle it. This patch adds rudimentary support for debugging with DW_TAG_template_alias.

This patch simply creates the same kind of TypedefDecl as we do for DW_TAG_typedef. The more complete solution would be to create a TypeAliasTemplateDecl and associated TypeAliasDecl. But that would require DWARF to carry generic template information, but currently each DW_TAG_template_alias represents a concrete instantiation. We could probably hack up some working AST representation that includes the template parameters, but I currently don't see a compelling reason to. All we need is the DW_AT_name and the DW_AT_type that the typedef refers to.

One compelling reason to support DW_TAG_template_alias is that with -gsimple-template-names, DW_TAG_typedefs for alias templates have their template parameters stripped from the DW_AT_name. With just a plain DW_TAG_typedef, LLDB has no way to reconstruct the full DW_AT_name. But since DW_TAG_template_alias can carry template parameter children, LLDB can reconstitute the name by concatenating the DW_AT_names of the child tags.

---

Patch is 24.25 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/170135.diff

2 Files Affected:

• (modified) lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp (+3-1)
• (modified) lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp (+211-182)

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp index 36aa49ac3de95..3d556aea7b183 100644 --- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp +++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp @@ -623,6 +623,7 @@ TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, switch (tag) { case DW_TAG_typedef: + case DW_TAG_template_alias: case DW_TAG_base_type: case DW_TAG_pointer_type: case DW_TAG_reference_type: @@ -748,7 +749,7 @@ DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, TypeSP type_sp; CompilerType clang_type; - if (tag == DW_TAG_typedef) { + if (tag == DW_TAG_typedef || tag == DW_TAG_template_alias) { // DeclContext will be populated when the clang type is materialized in // Type::ResolveCompilerType. PrepareContextToReceiveMembers( @@ -836,6 +837,7 @@ DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; case DW_TAG_typedef: + case DW_TAG_template_alias: encoding_data_type = Type::eEncodingIsTypedefUID; break; case DW_TAG_const_type: diff --git a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp index cef3a25a4a960..9e2722d53cc6d 100644 --- a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp +++ b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp @@ -12,6 +12,7 @@ #include "TestingSupport/Symbol/ClangTestUtils.h" #include "TestingSupport/Symbol/YAMLModuleTester.h" #include "lldb/Core/Debugger.h" +#include "lldb/Symbol/Type.h" #include "gmock/gmock.h" #include "gtest/gtest.h" @@ -42,6 +43,46 @@ class DWARFASTParserClangStub : public DWARFASTParserClang { return keys; } }; + +/// Helper structure for DWARFASTParserClang tests that want to parse DWARF +/// generated using yaml2obj. On construction parses the supplied YAML data +/// into a DWARF module and creates a DWARFASTParserClang and TypeSystem that +/// live for the duration of this object. +class DWARFASTParserClangYAMLTester { +public: + DWARFASTParserClangYAMLTester(llvm::StringRef yaml_data) + : m_module_tester(yaml_data), + m_ast_holder_up( + std::make_unique<clang_utils::TypeSystemClangHolder>("ast")), + m_stub(*m_ast_holder_up->GetAST()) {} + + DWARFDIE GetCUDIE() { + DWARFUnit *unit = m_module_tester.GetDwarfUnit(); + assert(unit); + + const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); + assert(cu_entry->Tag() == DW_TAG_compile_unit); + + return DWARFDIE(unit, cu_entry); + } + + DWARFASTParserClangStub &GetParser() { return m_stub; } + + TypeSystemClang &GetTypeSystem() { + assert(m_ast_holder_up); + + TypeSystemClang *ts = m_ast_holder_up->GetAST(); + + assert(ts); + + return *ts; + } + +private: + YAMLModuleTester m_module_tester; + std::unique_ptr<clang_utils::TypeSystemClangHolder> m_ast_holder_up; + DWARFASTParserClangStub m_stub; +}; } // namespace // If your implementation needs to dereference the dummy pointers we are @@ -100,23 +141,15 @@ TEST_F(DWARFASTParserClangTests, - AbbrCode: 0x00000000 )"; - YAMLModuleTester t(yamldata); - ASSERT_TRUE((bool)t.GetDwarfUnit()); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFASTParserClangStub &ast_parser = tester.GetParser(); - DWARFASTParserClangStub ast_parser(ast_ctx); - - DWARFUnit *unit = t.GetDwarfUnit(); - const DWARFDebugInfoEntry *die_first = unit->DIE().GetDIE(); - const DWARFDebugInfoEntry *die_child0 = die_first->GetFirstChild(); - const DWARFDebugInfoEntry *die_child1 = die_child0->GetSibling(); - const DWARFDebugInfoEntry *die_child2 = die_child1->GetSibling(); - const DWARFDebugInfoEntry *die_child3 = die_child2->GetSibling(); - std::vector<DWARFDIE> dies = { - DWARFDIE(unit, die_child0), DWARFDIE(unit, die_child1), - DWARFDIE(unit, die_child2), DWARFDIE(unit, die_child3)}; + DWARFDIE die_first = tester.GetCUDIE(); + DWARFDIE die_child0 = die_first.GetFirstChild(); + DWARFDIE die_child1 = die_child0.GetSibling(); + DWARFDIE die_child2 = die_child1.GetSibling(); + DWARFDIE die_child3 = die_child2.GetSibling(); + std::vector<DWARFDIE> dies = {die_child0, die_child1, die_child2, die_child3}; std::vector<clang::DeclContext *> decl_ctxs = { (clang::DeclContext *)1LL, (clang::DeclContext *)2LL, (clang::DeclContext *)2LL, (clang::DeclContext *)3LL}; @@ -248,17 +281,9 @@ TEST_F(DWARFASTParserClangTests, TestCallingConventionParsing) { - AbbrCode: 0x0 ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - DWARFDIE cu_die(unit, cu_entry); + DWARFASTParserClangYAMLTester tester(yamldata); - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFDIE cu_die = tester.GetCUDIE(); std::vector<std::string> found_function_types; // The DWARF above is just a list of functions. Parse all of them to @@ -267,7 +292,8 @@ TEST_F(DWARFASTParserClangTests, TestCallingConventionParsing) { ASSERT_EQ(func.Tag(), DW_TAG_subprogram); SymbolContext sc; bool new_type = false; - lldb::TypeSP type = ast_parser.ParseTypeFromDWARF(sc, func, &new_type); + lldb::TypeSP type = + tester.GetParser().ParseTypeFromDWARF(sc, func, &new_type); found_function_types.push_back( type->GetForwardCompilerType().GetTypeName().AsCString()); } @@ -394,18 +420,9 @@ TEST_F(DWARFASTParserClangTests, TestPtrAuthParsing) { - AbbrCode: 0x00 # end of child tags of 0x0c ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); DWARFDIE ptrauth_variable = cu_die.GetFirstChild(); ASSERT_EQ(ptrauth_variable.Tag(), DW_TAG_variable); DWARFDIE ptrauth_type = @@ -415,7 +432,7 @@ TEST_F(DWARFASTParserClangTests, TestPtrAuthParsing) { SymbolContext sc; bool new_type = false; lldb::TypeSP type_sp = - ast_parser.ParseTypeFromDWARF(sc, ptrauth_type, &new_type); + tester.GetParser().ParseTypeFromDWARF(sc, ptrauth_type, &new_type); CompilerType compiler_type = type_sp->GetForwardCompilerType(); ASSERT_EQ(compiler_type.GetPtrAuthKey(), 0U); ASSERT_EQ(compiler_type.GetPtrAuthAddressDiversity(), false); @@ -554,24 +571,17 @@ TEST_F(DWARFASTParserClangTests, TestDefaultTemplateParamParsing) { auto BufferOrError = llvm::MemoryBuffer::getFile( GetInputFilePath("DW_AT_default_value-test.yaml"), /*IsText=*/true); ASSERT_TRUE(BufferOrError); - YAMLModuleTester t(BufferOrError.get()->getBuffer()); - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(BufferOrError.get()->getBuffer()); + DWARFDIE cu_die = tester.GetCUDIE(); llvm::SmallVector<lldb::TypeSP, 2> types; for (DWARFDIE die : cu_die.children()) { if (die.Tag() == DW_TAG_class_type) { SymbolContext sc; bool new_type = false; - types.push_back(ast_parser.ParseTypeFromDWARF(sc, die, &new_type)); + types.push_back( + tester.GetParser().ParseTypeFromDWARF(sc, die, &new_type)); } } @@ -605,23 +615,14 @@ TEST_F(DWARFASTParserClangTests, TestSpecDeclExistsError) { auto BufferOrError = llvm::MemoryBuffer::getFile( GetInputFilePath("DW_AT_spec_decl_exists-test.yaml"), /*IsText=*/true); ASSERT_TRUE(BufferOrError); - YAMLModuleTester t(BufferOrError.get()->getBuffer()); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(BufferOrError.get()->getBuffer()); + DWARFDIE cu_die = tester.GetCUDIE(); llvm::SmallVector<lldb::TypeSP, 2> specializations; for (DWARFDIE die : cu_die.children()) { SymbolContext sc; bool new_type = false; - auto type = ast_parser.ParseTypeFromDWARF(sc, die, &new_type); + auto type = tester.GetParser().ParseTypeFromDWARF(sc, die, &new_type); llvm::StringRef die_name = llvm::StringRef(die.GetName()); if (die_name.starts_with("_Optional_payload")) { specializations.push_back(std::move(type)); @@ -730,18 +731,8 @@ TEST_F(DWARFASTParserClangTests, TestUniqueDWARFASTTypeMap_CppInsertMapFind) { - AbbrCode: 0x00 # end of child tags of 0x0c ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); DWARFDIE decl_die; DWARFDIE def_die; @@ -762,6 +753,8 @@ TEST_F(DWARFASTParserClangTests, TestUniqueDWARFASTTypeMap_CppInsertMapFind) { ParsedDWARFTypeAttributes attrs(def_die); ASSERT_TRUE(attrs.decl.IsValid()); + DWARFASTParserClangStub &ast_parser = tester.GetParser(); + SymbolContext sc; bool new_type = false; lldb::TypeSP type_sp = ast_parser.ParseTypeFromDWARF(sc, decl_die, &new_type); @@ -906,18 +899,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer) { - AbbrCode: 0x0 ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto context_die = cu_die.GetFirstChild(); ASSERT_TRUE(context_die.IsValid()); @@ -932,7 +915,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer) { auto param_die = decl_die.GetFirstChild(); ASSERT_TRUE(param_die.IsValid()); - EXPECT_EQ(param_die, ast_parser.GetObjectParameter(decl_die, context_die)); + EXPECT_EQ(param_die, + tester.GetParser().GetObjectParameter(decl_die, context_die)); } { @@ -945,8 +929,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer) { auto param_die = subprogram_definition.GetFirstChild(); ASSERT_TRUE(param_die.IsValid()); - EXPECT_EQ(param_die, ast_parser.GetObjectParameter(subprogram_definition, - context_die)); + EXPECT_EQ(param_die, tester.GetParser().GetObjectParameter( + subprogram_definition, context_die)); } } @@ -1076,18 +1060,8 @@ TEST_F(DWARFASTParserClangTests, - AbbrCode: 0x0 ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto context_die = cu_die.GetFirstChild(); ASSERT_TRUE(context_die.IsValid()); @@ -1105,7 +1079,7 @@ TEST_F(DWARFASTParserClangTests, auto param_die = subprogram_definition.GetFirstChild(); ASSERT_TRUE(param_die.IsValid()); EXPECT_EQ(param_die, - ast_parser.GetObjectParameter(subprogram_definition, {})); + tester.GetParser().GetObjectParameter(subprogram_definition, {})); } TEST_F(DWARFASTParserClangTests, TestParseSubroutine_ExplicitObjectParameter) { @@ -1243,14 +1217,8 @@ TEST_F(DWARFASTParserClangTests, TestParseSubroutine_ExplicitObjectParameter) { - AbbrCode: 0x0 ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto ts_or_err = cu_die.GetDWARF()->GetTypeSystemForLanguage(eLanguageTypeC_plus_plus); @@ -1419,22 +1387,8 @@ TEST_F(DWARFASTParserClangTests, TestParseSubroutine_ParameterCreation) { - AbbrCode: 0x0 ... )"; - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto ts_or_err = - cu_die.GetDWARF()->GetTypeSystemForLanguage(eLanguageTypeC_plus_plus); - ASSERT_TRUE(static_cast<bool>(ts_or_err)); - llvm::consumeError(ts_or_err.takeError()); - - auto *ts = static_cast<TypeSystemClang *>(ts_or_err->get()); - auto *parser = static_cast<DWARFASTParserClang *>(ts->GetDWARFParser()); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto subprogram = cu_die.GetFirstChild(); ASSERT_TRUE(subprogram.IsValid()); @@ -1442,11 +1396,13 @@ TEST_F(DWARFASTParserClangTests, TestParseSubroutine_ParameterCreation) { SymbolContext sc; bool new_type; - auto type_sp = parser->ParseTypeFromDWARF(sc, subprogram, &new_type); + auto type_sp = + tester.GetParser().ParseTypeFromDWARF(sc, subprogram, &new_type); ASSERT_NE(type_sp, nullptr); - auto result = ts->GetTranslationUnitDecl()->lookup( - clang_utils::getDeclarationName(*ts, "func")); + TypeSystemClang &ts = tester.GetTypeSystem(); + auto result = ts.GetTranslationUnitDecl()->lookup( + clang_utils::getDeclarationName(ts, "func")); ASSERT_TRUE(result.isSingleResult()); auto const *func = llvm::cast<clang::FunctionDecl>(result.front()); @@ -1609,19 +1565,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer_IndexEncoding) { - AbbrCode: 0x0 ... )"; - - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto context_die = cu_die.GetFirstChild(); ASSERT_TRUE(context_die.IsValid()); @@ -1640,7 +1585,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer_IndexEncoding) { auto param_die = sub1.GetFirstChild().GetSibling(); ASSERT_TRUE(param_die.IsValid()); - EXPECT_EQ(param_die, ast_parser.GetObjectParameter(sub1, context_die)); + EXPECT_EQ(param_die, + tester.GetParser().GetObjectParameter(sub1, context_die)); } // Object parameter is at constant index 0 @@ -1648,7 +1594,8 @@ TEST_F(DWARFASTParserClangTests, TestObjectPointer_IndexEncoding) { auto param_die = sub2.GetFirstChild(); ASSERT_TRUE(param_die.IsValid()); - EXPECT_EQ(param_die, ast_parser.GetObjectParameter(sub2, context_die)); + EXPECT_EQ(param_die, + tester.GetParser().GetObjectParameter(sub2, context_die)); } } @@ -1711,19 +1658,8 @@ TEST_F(DWARFASTParserClangTests, TestTypeBitSize) { - Value: 0x02 ... )"; - - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto type_die = cu_die.GetFirstChild(); ASSERT_TRUE(type_die.IsValid()); @@ -1734,8 +1670,8 @@ TEST_F(DWARFASTParserClangTests, TestTypeBitSize) { EXPECT_EQ(attrs.data_bit_size.value_or(0), 2U); SymbolContext sc; - auto type_sp = - ast_parser.ParseTypeFromDWARF(sc, type_die, /*type_is_new_ptr=*/nullptr); + auto type_sp = tester.GetParser().ParseTypeFromDWARF( + sc, type_die, /*type_is_new_ptr=*/nullptr); ASSERT_NE(type_sp, nullptr); EXPECT_EQ(llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0), @@ -1857,27 +1793,17 @@ TEST_F(DWARFASTParserClangTests, TestBitIntParsing) { ... )"; - - YAMLModuleTester t(yamldata); - - DWARFUnit *unit = t.GetDwarfUnit(); - ASSERT_NE(unit, nullptr); - const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE(); - ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit); - ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus); - DWARFDIE cu_die(unit, cu_entry); - - auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast"); - auto &ast_ctx = *holder->GetAST(); - DWARFASTParserClangStub ast_parser(ast_ctx); + DWARFASTParserClangYAMLTester tester(yamldata); + DWARFDIE cu_die = tester.GetCUDIE(); auto type_die = cu_die.GetFirstChild(); ASSERT_TRUE(type_die.IsValid()); { SymbolContext sc; - auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die, - /*type_is_new_ptr=*/nullptr); + auto type_sp = + tester.GetParser().ParseTypeFromDWARF(sc, type_die, + /*type_is_new_ptr=*/nullptr); ASSERT_NE(type_sp, nullptr); EXPECT_EQ( @@ -1891,8 +1817,9 @@ TEST_F(DWARFASTParserClangTests, TestBitIntParsing) { { type_die = type_die.GetSibling(); SymbolContext sc; - auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die, - /*type_is_new_ptr=*/nullptr); + auto type_sp = + tester.GetParser().ParseTypeFromDWARF(sc, type_die, + /*type_is_new_ptr=*/nullptr); ASSERT_NE(type_sp, nullptr); EXPECT_EQ( @@ -1906,8 +1833,9 @@ TEST_F(DWARFASTParserClangTests, TestBitIntParsing) { { t... [truncated] 

[dwblaikie]

One compelling reason to support DW_TAG_template_alias is that with -gsimple-template-names, DW_TAG_typedefs for alias templates have their template parameters stripped from the DW_AT_name.

Is this true? https://godbolt.org/z/YEPE1fobE doesn't /look/ like it's true?

[Michael137]

One compelling reason to support DW_TAG_template_alias is that with -gsimple-template-names, DW_TAG_typedefs for alias templates have their template parameters stripped from the DW_AT_name.

Is this true? https://godbolt.org/z/YEPE1fobE doesn't /look/ like it's true?

Oh maybe I'm misremembering, thought that's why Sony needed it. Let me check

[Michael137]

One compelling reason to support DW_TAG_template_alias is that with -gsimple-template-names, DW_TAG_typedefs for alias templates have their template parameters stripped from the DW_AT_name.

Is this true? https://godbolt.org/z/YEPE1fobE doesn't /look/ like it's true?

Yea seems like i misremembered this, updated the description.